[ACE-OF-ACES]

I've another questionomewhere i have seen that you can install HSFX 5.0 if you already run HSFX 4.11 by just disabling first the mods via JSGME , than patch the game from 4.09 to 4.10 , than install 5.0 wich will overwright the older HSFX. This way you don't have to reinstall the game allover.
It's possible?

Yes but as Mouguse pointed out you have to patch it to 4.10.1

And like you said turn off ALL the mods via JSGME before installing HSFX 5.0

In short what HSFX 5.0 will do is rename/del your current jsgme folder and other folders such that it is practally a clean install as far as HSFX 5.0 is concernted, in that it is going to install new versions of jsgme and other folders

But, I allways recomend starting with a clean install of IL-2 4.10.1!

Not that I dont trust the installer, Im just anal like that

Also note, some of the mods you may have used in HSFX 4.1 (4.09) may not work with HSFX 5.0, so if you do plan on installing previous mods, do them one at a time and test each by running the game after install, instead of just installing them all at once and than not knowing which 'one' caused the CTD